import com.fasterxml.jackson.databind.ObjectMapper;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User:DELL
 * Date:2025-03-11
 * Time:23:10
 */
class Request{
    public String username;
    public String password;
}
class Response{
    public boolean ok;
}
@WebServlet("/json")
public class JsonParameterServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        //此处约定请求格式如下：
        //POST/json
        //Content-Type:application/json
        //{
        //     username:"zhangsan"
        //      password:"123"
        //}
        //此处也约定响应的格式：
        //{
        //      ok:ture;
        //}
        //把请求的body按照json格式解析成java对象
        ObjectMapper objectMapper=new ObjectMapper();//键值对
        Request request=objectMapper.readValue(req.getInputStream(),Request.class);
        System.out.println("username"+request.username);
        System.out.println("password"+request.password);
        Response response=new Response();
        response.ok=true;
        //把响应格式转成json字符串
        String respJson=objectMapper.writeValueAsString(response);
        resp.setContentType("application/json;charset=utf8");
        resp.getWriter().write(respJson);

    }
}
